EP2200123B1 - Steckverbinder, Antenne mit dem Steckverbinder und Fahrzeugfensterglas mit der Antenne - Google Patents

Steckverbinder, Antenne mit dem Steckverbinder und Fahrzeugfensterglas mit der Antenne Download PDF

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Publication number
EP2200123B1
EP2200123B1 EP09015816.3A EP09015816A EP2200123B1 EP 2200123 B1 EP2200123 B1 EP 2200123B1 EP 09015816 A EP09015816 A EP 09015816A EP 2200123 B1 EP2200123 B1 EP 2200123B1
Authority
EP
European Patent Office
Prior art keywords
antenna
connector
terminal
earth
glass
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP09015816.3A
Other languages
English (en)
French (fr)
Other versions
EP2200123A1 (de
Inventor
Shoichi Takeuchi
Katsumi Hisaeda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AGC Inc
Original Assignee
Asahi Glass Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Glass Co Ltd filed Critical Asahi Glass Co Ltd
Publication of EP2200123A1 publication Critical patent/EP2200123A1/de
Application granted granted Critical
Publication of EP2200123B1 publication Critical patent/EP2200123B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/38—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts
    • H01R24/40—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency
    • H01R24/52—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency mounted in or to a panel or structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/1271—Supports; Mounting means for mounting on windscreens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/32—Vertical arrangement of element
    • H01Q9/38—Vertical arrangement of element with counterpoise
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/646—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00 specially adapted for high-frequency, e.g. structures providing an impedance match or phase match
    • H01R13/6461—Means for preventing cross-talk
    • H01R13/6471—Means for preventing cross-talk by special arrangement of ground and signal conductors, e.g. GSGS [Ground-Signal-Ground-Signal]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/646—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00 specially adapted for high-frequency, e.g. structures providing an impedance match or phase match
    • H01R13/6473—Impedance matching
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2103/00—Two poles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2201/00—Connectors or connections adapted for particular applications
    • H01R2201/02—Connectors or connections adapted for particular applications for antennas

Definitions

  • the present invention relates to a connector, an antenna provided with the connector, and a vehicular window glass provided with the antenna.
  • What is called a glass antenna installed on a window glass or the like is known as a vehicle-mounted antenna.
  • the glass antenna is constructed by placing a linear conductor on a surface of a dielectric substrate such as the window glass. Radio signals received by the antenna are transmitted by a transmission line such as a coaxial cable to a receiving apparatus such as a television receiver.
  • a transmission line such as a coaxial cable
  • a receiving apparatus such as a television receiver.
  • Various connectors for connecting the antenna and the coaxial cable to each other are known.
  • FIG. 10 illustrates an example of mounting a connector for connecting a glass antenna formed on a surface of a glass substrate to a coaxial cable.
  • This connector is brought into a state in which a holder portion and a pickup portion are detachably fit to each other.
  • the holder portion is solder-connected to the glass antenna installed on the substrate.
  • the pickup portion fit into the holder portion is connected to a coaxial cable.
  • the connector is briefly described with reference to FIGS. 8A through 10 .
  • FIG. 8A to 8F are views illustrating the holder portion of the connector.
  • the holder portion 15 of the connector is constructed such that terminals are arranged on both sides of the bottom portion of an insulating case 14 formed into a rectangular parallelepiped shape whose two surfaces are opened.
  • an earth terminal 13 is illustrated in a right-side part of the bottom view, while a feeding terminal 12 is illustrated in a left-side part thereof.
  • the feeding terminal 12 has a connecting pin 12a erected towards the inside of an insulating case 14.
  • the connecting pin 12a is connected to a core wire 23a of a coaxial cable 23 via a fitting terminal 25 of a pickup portion 21 illustrated in FIGS. 2A to 2F .
  • the earth terminal 13 has two connection portions 13a which are respectively erected along the inner sides of both side surfaces of the insulating case 14. Each connection portion 13a is connected to an outer conductor 23b of the coaxial cable 23 via an earth conductor 24 of the pickup portion 21. Connection portions 12b and 13b of the terminals 12 and 13 connected to the glass antenna installed on the substrate are protrudingly provided at both end portions in the longer-side direction of the insulating case 14. Thus, soldering of the holder portion to the glass antenna installed on the substrate is facilitated.
  • Each of the feeding terminal 12 and the earth terminal 13 is fixed to the insulating case 14 by an associated one of pairs 12c and 13c of connection portions erected so as to sandwich outer side surfaces of the insulating case 14.
  • FIG. 9 is an explanatory view illustrating a state in which this connector is attached to the glass antenna installed on the glass substrate.
  • a feeding portion of a radiating element 8 of the glass antenna installed on the glass substrate 5 is soldered to a mounting portion 12b of the feeding terminal 12 of the connector 11.
  • An earth electrode 6 is soldered to a mounting portion 13b of the earth terminal 13.
  • Parameters LD, pd, s0, and g0 representing the shape and the arrangement of the glass antenna are determined by the reception characteristic of the glass antenna.
  • FIG. 10 shows a perspective view illustrating a state in which this connector is actually connected to the glass antenna installed on the glass substrate.
  • Such a connector is disclosed as a commercial product in, e.g., GT 19 Series Connectors for Glass Antennas Catalog published by Hirose Electric Co., Ltd., pages 139 through 142.
  • JP-A-2008-035479 discloses a circuit-board-built-in connector obtained by incorporating a circuit board into a connector similar to the aforementioned connector for a glass antenna.
  • JP-A-2004-031068 and JP-A-2005-110200 disclose the following connectors. That is, each of the connectors is constructed so that a holder portion thereof to be attached to a surface of a substrate, on which an antenna is installed, is adherently fixed thereto using a double-stick tape.
  • each of the connectors has a pickup portion that is freely attachable to and detachable from the holder portion and that can be connected to the antenna utilizing an elastic force of a feeding terminal.
  • each of the connectors can easily be fixed and attached thereto and detached therefrom.
  • JP-A-2002-305062 discloses a connector device whose central conductor connected to a transmission line conductor (core wire) of a coaxial cable is slantingly connected to a surface of a substrate, on which an antenna is disposed, in order to prevent occurrence of a drastic change in the characteristic impedance of a signal transmission path of a connector portion.
  • the connectors for connecting a glass antenna (hereinafter sometimes referred to simply as an antenna) disposed on a substrate to a transmission line such as a coaxial cable, as disclosed in the above-mentioned Glass Antennas Catalog and JP-A-2008-035479 , JP-A-2004-031068 and JP-A-2005-110200 are constructed without consideration of transmission loss due to impedance mismatching occurring in the connection portion between the antenna (conductor) installed on a glass surface and the connector at frequencies of high-frequency bands, more specifically, frequency bands such as an ultrahigh frequency (UHF) band and a microwave or super-high-frequency (SHF) band.
  • UHF ultrahigh frequency
  • SHF microwave or super-high-frequency
  • the transmission loss of a signal transmitted from the antenna to a receiving apparatus through the coaxial cable is high, so that the signal cannot accurately be transmitted to the receiving apparatus.
  • a feeding portion of the antenna using frequencies which correspond to a high-frequency band of a gigahertz (GHz) range
  • the shape of the connection portion between the antenna installed on the glass surface and the connector non-negligibly affects wavelengths to be used.
  • the connecting using the connector has a similar effect that the shape (or size) of the feeding portion which is an important composing element of the antenna is deformed. Consequently, sometimes, signal transmission characteristics are greatly affected.
  • GPS global positioning system
  • a connection angle at which the feeding portion of the antenna is connected to the feeding terminal of the connector is determined in consideration of the impedance of the transmission path.
  • the accuracy and the reliability of the connection therebetween are problematic.
  • assurance of durability is problematic.
  • EP 0 506 451 A1 discloses an antenna connector comprising a first housing for accommodating an end of a coaxial cable and a second housing for accommodating the first housing and a pair of conductive feeding metal plates.
  • an object of the invention is to provide a connector that can suppress the transmission loss of a transmission line when an electric signal of a high-frequency band is transmitted, and that has reliability and durability when mounted on a substrate such as a vehicle window glass.
  • Other objects of the invention are to provide an antenna on which this connector is installed, and to provide a vehicle window glass having this antenna.
  • the impedances of most coaxial cables used for television sets or the like are about 50 ohms ( ⁇ ) through 75 ⁇ .
  • the impedance of the connector is designed assuming the coaxial cable to be used.
  • the width of the feeding terminal thereof and the distance between the feeding terminal and each of parts of the earth terminal, which sandwich both sides of the feeding terminal are designed in consideration of the shapes and the properties of a substrate, on which the connector is attached, and a glass antenna.
  • the width of the feeding terminal and the distance between the feeding terminal and the earth terminal are set so as not to affect the function of the coplanar waveguide line formed in the glass antenna.
  • the connector according to the invention is a surface mounting type connector suitable for transmitting from antennas for receiving signals of high frequencies of a very high frequency (VHF) band, an ultrahigh frequency (UHF) band, a microwave or super-high-frequency (SHF) band, and the like, particularly, a glass antenna for receiving signals of frequencies of a GHz-band.
  • the connector according to the invention is a surface mounting type connector enabled to be easily connected to a transmission line formed on a surface of a substrate, e.g., a feeding line of a glass antenna provided on a glass plate, so that the signal transmission loss of the transmission line including the connector and a coaxial cable connected thereto is low.
  • This connector has a structure in which a holder portion and a pickup portion are detachably fittable to each other so that the coaxial cable can be easily attached to the substrate.
  • connection portion and the earth terminal of the connector may configure a coplanar waveguide line.
  • the feeding terminal and the earth terminal which is disposed at a predetermined distance from each of both sides of the feeding terminal, are connected to the glass antenna, the feeding terminal and the earth terminal constitute a coplanar waveguide line.
  • the characteristic impedance of the coplanar waveguide line is substantially equal to that of the coaxial cable, the feeding terminal hardly serves as an antenna for radio signals of high-frequencies.
  • the feeding terminal serves substantially only as the transmission line.
  • signals received from the antenna can efficiently be transmitted by the terminals, together with the coaxial cable, to the receiving apparatus.
  • the terminals can undertake the role of the coplanar waveguide portion of the antenna.
  • the earth terminal may include attaching portions provided protrudingly at both ends in a longer-side direction of an attaching surface of the holder portion, at which the holder portion is attached to the glass antenna, and the connection portion provided protrudingly in a shorter-side direction of the attaching surface of the holder portion, at which the holder portion is attached to the glass antenna.
  • the connector is attached to the glass antenna, usually by soldering the feeding terminal and the earth terminal to the glass antenna.
  • soldering the feeding terminal and the earth terminal to the glass antenna.
  • the earth terminal has soldering portions at both ends in the longer-side direction of the connector.
  • the feeding terminal has a soldering portion provided protrudingly in the shorter-side direction perpendicular to the longer-side direction. Consequently, the fixing of the connector to the substrate surface is strongly and reliably achieved.
  • an antenna including: an antenna portion, including a linear radiating element and an earth electrode, the radiating element and the earth electrode being disposed on a dielectric substrate, wherein: the feeding terminal of the connector according to the above invention is connected to the radiating element; and the earth terminal of the connector is connected to the earth electrode.
  • the antenna according to the invention is so-called a monopole antenna having an earth electrode and a single radiating element.
  • This antenna can be designed so that transmission loss hardly occurs in a transmission line including a connector and a coaxial cable upon receiving the radio wave of high-frequency bands by the antenna. That is, the antenna according to the invention can be designed so that the characteristic impedance of an antenna portion has a desired value. The characteristic impedance of a part including the coaxial cable and the connector can easily be adjusted to that of the antenna portion.
  • a part of the radiating element and the earth electrode may configure a coplanar waveguide line.
  • the coplanar waveguide line is constructed such that the characteristic impedance of the antenna can be set at a desired value.
  • the connector is connected to the coplanar waveguide line so as not to break the coplanar waveguide line, the length and the shape of a receiving portion of the antenna do not change, nor does the characteristic impedance of the antenna portion.
  • signals corresponding to the received radio signals can be transmitted from the transmission line including the connector and the coaxial cable to the receiving apparatus without transmission loss.
  • a vehicular window glass according to the invention is a glass substrate including the antenna of the above invention.
  • the above glass antenna according to the invention is preferred as such an antenna.
  • Vehicular antennas particularly need durability against vibrations and physical stress.
  • the vehicular antennas require relatively-long-term durability.
  • the vehicular window glass according to the invention can meet such requirements.
  • vehicular receiving apparatuses or the like are used at locations where the radio wave condition of the received radio wave is not good.
  • the vehicular window glass according to the invention can exercise excellent transmission performance in the transmission line connecting the antenna, the connector, and the coaxial cable. Consequently, good quality signals can be transmitted to the receiving apparatus.
  • the invention can provide a connector that can suppress the transmission loss of a transmission line when an electric signal of a high-frequency band is transmitted, and that has reliability and durability when mounted on a substrate such as a vehicle window glass.
  • the invention can provide an antenna on which this connector is installed, and a vehicular window glass having this antenna.
  • FIGS. 1A to 1F show views illustrating the holder portion of the connector according to Embodiment 1 of the invention, FIG. 1A being a front view, FIG. 1B being a right side view, FIG. 1C being a left side view, FIG. 1D being a plan view, FIG. 1E being a bottom view, and FIG. 1F being a rear view.
  • FIGS. 2A to 2E show views illustrating the pickup portion of the connector according to Embodiment 1 of the invention.
  • FIG. 2F shows a cross-sectional view taken on line A-A' illustrated in FIG. 2D .
  • the connector according to the present embodiment is described below with reference to FIGS. 1A to 2F .
  • a holder portion 10 of this connector is constructed so that two terminals are arranged on a bottom portion of an insulating case 4 formed into a substantially hollow rectangular parallelepiped shape whose two surfaces are opened.
  • the holder portion of the conventional connector illustrated in FIGS. 8A to 8F has the earth terminal 13 and the feeding terminal 12 respectively provided at both ends of the bottom surface.
  • the holder portion 10 of the connector according to the present embodiment includes a feeding terminal 2 provided close to a central part of the bottom surface thereof, and an earth terminal 3 having opposed portions respectively provided at both sides of the feeding terminal 2 so that each of the opposed portions thereof is separated at a predetermined distance from an associated one of both sides of the feeding terminal 2.
  • the width a of the feeding terminal 2 illustrated in the bottom view shown in FIG. 1E , and the distance b between both sides of the feeding terminal 2 and associated parts of the earth terminal 3 are designed so that when radio signals are transmitted from the antenna to a coaxial cable to which the antenna is connected by the connector, transmission loss of the signals is small. That is, when the connector connected to the coaxial cable is connected to a predetermined antenna, the feeding terminal 2 and the earth terminal 3, which serve as the connection portion between the antenna and the connector, have a coplanar waveguide line structure for radio signals to be received. Thus, a coplanar waveguide line portion of the feeding terminal 2 exhibits a predetermined characteristic impedance to received radio signals.
  • the characteristic impedance of the transmission line constituted by connecting the connector to the coaxial cable can be set to be equal to that of the antenna.
  • the width a of the feeding terminal 2 and the distance b between the feeding terminal 2 and the earth terminal 3 are set according to the shape of the antenna, to which the connector is connected, and the permittivity of the substrate. As will be described below, the width a and the distance b are designed by taking into consideration conditions for the antenna to which the connector is connected.
  • the feeding terminal 2 has a connecting pin 2a erected towards the inside of an insulating case 4.
  • the connecting pin 2a is connected to a core wire 23a of a coaxial cable 23 via a fitting terminal 25 of a pickup portion 21 illustrated in FIGS. 2A to 2F . Signals input to the feeding terminal 2 are transmitted to the coaxial cable 23.
  • the earth terminal 3 has two connection portions 3a which are respectively erected along the inner sides of both side surfaces in shorter-side direction of the insulating case 4.
  • Each connection portion 3a is connected to an outer conductor 23b of the coaxial cable 23 via a connection portion 24a and a fixing portion (crimping portion) 24b of an earth conductor 24 of the pickup portion 21 illustrated in FIGS. 2A to 2F .
  • the connection portions 3a of a holder portion 10 are swollen towards the inner side of the insulating case 4.
  • the connection portions 3a are connected thereto by pressing the connection portion 24a formed on side surfaces of the earth conductor 24 of the pickup portion 21 with an elastic force thereof.
  • the connection portions 3a assure the certainty of electrical conduction.
  • the connection portions 3a have the function of holding the pickup portion 21 when the pickup portion 21 is fit to the holder portion 10.
  • connection portion 2b of the feeding terminal 2 with the glass antenna installed on the substrate is provided protrudingly in the direction of a rear surface (direction of a shorter-side of a rectangular shape in bottom view) of the insulating case 4.
  • the connection portions 3b, 3b of the earth terminal 3 with the glass antenna installed on the substrate are protrudingly provided at both end portions in the direction of a side surface (direction of a longer-side of the rectangular shape in bottom view) of the insulating case 4.
  • portions of the earth terminal 3 are fixed to the insulating case 4 with two pairs of fixing portions 3c and 3d thereof erected so as to sandwich the front surface and the rear surface (in the shorter-side direction) of the insulating case 4, respectively.
  • such portions of the earth terminal 3, which are provided on both sides of the feeding terminal 2 are electrically conducted to each other.
  • portions of the earth terminal 3 are separated from each other, there is no problem, because such portions are electrically conducted to each other when connected to the earth electrode.
  • FIGS. 2A to 2E are views illustrating the pickup portion 21 of the connector according to the present embodiment, FIG. 2A being a front view, FIG. 2B being a right side view, FIG. 2C being a left side view, FIG. 2D being a plan view, and FIG. 2E being a bottom view.
  • FIG. 2F is a cross-sectional view taken on line A-A' shown in FIG. 2D .
  • the pickup portion 21 of_the connector according to the present embodiment is described with reference to FIGS. 2A to 2F .
  • the pickup portion 21 includes a substantially parallelepiped hollow insulating case 22, an earth conductor 24, and a fitting terminal 25.
  • the earth conductor 24 includes the connection portion 24a provided in the insulating case 22 so as to be connected to the connection portion 3a of the holder portion 10, and the fixing portion (crimping portion) 24b that crimps and performs the electrical conduction of an outer conductor 23b of the coaxial cable 23 introduced into the insulating case 22.
  • the fitting terminal 25 is used to fit the core wire 23a of the coaxial cable 23 to the connecting pin 2a of the holder portion 10 to thereby transmit signals from the connecting pin 2a to the core wire 23a.
  • the fitting terminal 25 is fixed in a fitting terminal fixing insulating case 26.
  • the fitting terminal fixing insulating case 26 is fixed in the earth conductor 24 so as to be enclosed therein and includes a fitting portion 25a, which is fit onto the connection portion 2a of the holder portion 10, and a core wire fixing portion (crimping portion) 25b.
  • the core wire fixing portion (crimping portion) 25b and the core wire 23a of the coaxial cable 23 are crimped and conducted to each other.
  • the earth conductor 24 containing the fitting terminal 25 and the fitting terminal fixing insulating case 26 is fixed in the insulating case 22 so as to be enclosed therein.
  • FIGS. 3A to 3F show views illustrating a holder portion 10' of a connector according to another embodiment 2 of the invention, FIG. 3A being a front view, FIG. 3B being a right side view, FIG. 3C being a left side view, FIG. 3d being a plan view, FIG. 3E being a bottom view, and FIG. 3F being a rear view. Differences between the connector illustrated in FIGS. 3A to 3F and that according to Embodiment 1 are described below.
  • an earth terminal 3 of a holder portion 10' is formed of a single metal plate. Both end portions 3b, 3b of the earth terminal 3 are connected to each other.
  • An insulating case 4 lacks for a bottom surface.
  • Bottom portion fixing bars 4a and 4b are provided instead of a bottom surface.
  • a feeding terminal 2 is fixed to the insulating case 4 by the bottom portion fixing bar 4b.
  • the feeding terminal 2 does not protrude in the direction of the rear surface (a shorter-side direction in bottom view) of the insulating case 4 from the bottom portion thereof.
  • the soldering of the feeding terminal 2 to a radiating element of an antenna is difficult to perform.
  • the conduction of the radiating element of the antenna to the terminals can be assured utilizing an elastic force of the metallic feeding terminal 2 by soldering both end bonding portions 3b, 3b of the earth terminal to the glass antenna.
  • the rest of the connector according to the present embodiment is substantially the same as an associated part of the connector according to Embodiment 1.
  • the rest of the connector according to Embodiment 2 refer to the description of the associated part of the connector according to Embodiment 1.
  • Embodiment 3 is a glass antenna having the above connector according to Embodiment 1 of the invention.
  • FIG. 4 shows a layout drawing illustrating this antenna.
  • FIG. 5 shows a perspective view illustrating the antenna of Embodiment 3 attached to a glass substrate 5 illustrated in FIG. 5 .
  • this antenna is constructed so that an earth electrode 6 and a linear radiating element 7 are disposed on the glass substrate 5 which is a dielectric, and that a part of the radiating element 7 constitutes, together with the earth electrode 6, a coplanar waveguide line.
  • the coplanar waveguide line (hereinafter referred to as a CPW line) is a transmission line in which a central conductor (a part of the radiating element 7 having a length Lt in this case) having a certain width disposed on the dielectric substrate is sandwiched from both sides thereof by opposed portions of an outer conductor (opposed parts of the earth electrode 6, which sandwich the central conductor in this case) so that each of the opposed portions is spaced at a predetermined distance from the central conductor.
  • the central conductor can be set to be a transmission line having a specific characteristic impedance.
  • the distance W between the central conductor and each of the opposed portions of the outer conductor is determined by the permittivity and the thickness of the dielectric substrate, the width s of the central conductor, the electric-conductivities of the central conductor and the outer conductor, and the like.
  • the CPW line is formed in a range designated by "Lt" within the radiating element 7 illustrated in FIG. 4 .
  • the CPW line is a transmission line constituted by the width s of the radiating element 7 and the distance W between the central conductor and each of the opposed portions of the earth electrode 6.
  • a ratio of the width s of the central conductor to the distance W between the central conductor and each of the opposed portions of the earth electrode 6 is set, based on the thickness and the specific permittivity of the glass substrate 5, and the electric-conductivities of the central conductor and the earth conductor, so that the characteristic impedance has a predetermined value, e. g. , 50 ⁇ .
  • Techniques for forming the CPW line have been known as described in detail in literatures (e.g. , K.C. Gupta, et al., "Microstrip Lines and Slotlines", Artech House ).
  • the connector 1 is disposed on the glass substrate 5 so that a part of the feeding terminal 2, which is sandwiched between the opposed parts of the earth terminal 3, overlaps with the central conductor portion of the radiating element 7.
  • the width of the feeding terminal 2 (the width a shown in FIGS. 1A to 1F ) is equal to or less than the width s of the central conductor.
  • the distance ((a+2b) in the case illustrated in FIGS. 1A to 1F ) between the opposed portions of the earth terminal 3, which sandwich the feeding terminal 2 is equal to or larger than that ( (s + 2W) ) between the opposed portions of the outer conductor, which sandwich the central conductor. That is, the distance (b in the case illustrated in FIGS.
  • the width of the feeding terminal 2 of the connector 1 and the distance between the feeding terminal 2 of the connector 1 and each of the opposed portions of the earth terminal 3 constitute the CPW line. Therefore, the width of the central conductor installed on the glass substrate 5 can be equal to or less than the value s. In addition, the distance between the central conductor and each of the opposed portions of the outer conductor can be equal to or more than the value W. To summarize these modes, when the central conductor and the outer conductor are connected to the feeding terminal 2 and the earth terminal 3, respectively, the connection portion between the central conductor and the feeding terminal 2 can be regarded as an integral central conductor.
  • connection portion between the outer conductor and the earth terminal 3 can be regarded as an integral outer conductor.
  • a part of the radiating element 7, in which the CPW line is not formed corresponds to a receiving portion for receiving radio signals.
  • the attaching portions 3b at both end portions of the earth terminal 3 of the connector 1 are soldered to the earth electrode 6.
  • the attaching portion 2b of the feeding terminal 2 is soldered to the receiving portion of the radiating element 7. Consequently, the reliable fixing of the connector 1 onto the glass substrate 5, and the reliable connection between the radiating element 7 and the feeding terminal 2 and between the earth electrode 6 and the earth terminal 3 can be implemented.
  • a CPW line is formed such that the radiating element 7 and the feeding terminal 2 are integrated with each other, and that the earth terminal 3 and a part of the earth electrode 6 are integrated with each other. Accordingly, it is unnecessary to arrange a CPW line formation portion of the connector 1 and another CPW line formation portion constituted by the radiating element 7 and the earth electrode 6 by exactly adjusting. Consequently, the connector 1 may be disposed by being deviated in the longer-side direction of the radiating element 7. In addition, the length of the (signal) receiving portion Le of the radiating element 7 can be adjusted.
  • connection portion of the feeding terminal 2 on the glass substrate 5 has the form of a CPW line.
  • the distance between the connecting pin 2a and the fitting terminal 25 of the connector 1 is short.
  • the characteristic impedance of the CPW line of the connection portion of the feeding terminal 2 is set to be substantially the same as that (usually, about 50 ⁇ ) of the characteristic impedance of the coaxial cable. Consequently, the transmission loss of the transmission line extending from the antenna to the receiving apparatus can be reduced.
  • a CPW line is constructed in a part of the earth electrode 6 within a range designated by "Lt".
  • the central conductor of the CPW line is extended to form a monopole antenna.
  • the shape of the radiating element is not limited to that of the central conductor.
  • the width of a part of length Le of the radiating element 7 can be wide, as compared with the width s of the central conductor constituting the CPW line within the range designated by "Lt".
  • the width of the radiating element 7 can be gradually increased from that s.
  • the antenna can be formed to be a wideband antenna.
  • the radiating element 7 can spread like a fan shape.
  • the radiating element 7 can be branched into a plurality of elements.
  • an antenna pattern capable of receiving signals of frequencies of a desired frequency band is formed. Accordingly, the antenna can be formed to be a wideband or multi-band antenna.
  • the length Lt of the CPW line portion can optionally be selected in consideration of transmission loss.
  • any window glass such as a vehicular front window glass (windowscreen), a door window glass, a side window glass, and a rear window glass
  • a glass substrate on which an antenna according to the invention is mounted can be employed as a glass substrate on which an antenna according to the invention is mounted.
  • an architectural glass can be employed as the glass substrate.
  • the glass substrate according to the invention is not limited to a specific glass.
  • at least a part of the radiating element 7 and the earth electrode 6 are formed on a optically-opaque coating. Thus, only a thin straight-line portion of the radiating element 7 is viewed from a vehicular exterior side. This is preferable in respect of the design of a vehicle.
  • the conductors (the earth electrode 6 and the radiating element 7) provided on the glass substrate 5 are formed by printing a paste containing an electrically conductive metal, such as a silver paste, on a vehicle interior side of a glass plate and then firing the printed paste.
  • a method of forming the conductors on the glass substrate according to the invention is not limited to this forming method.
  • the conductors can be formed by forming a linear element or a foil element, which is made of an electrically conductive material such as copper, on the glass substrate.
  • such conductors can be formed on the glass substrate by an adhesive or the like.
  • the conductor on the glass substrate 5 is a silver conductor
  • the conductor can be formed by providing a conductor layer in or on a surface of a synthetic resin film and forming the synthetic resin film with the conductor layer on the glass substrate.
  • the conductor on the glass substrate can be formed by forming a flexible circuit board, on which the conductor is formed.
  • a optically-opaque coating can be formed on the glass substrate 5, and then the radiating element 7 and the earth electrode 6 can be partly or entirely provided on the optically-opaque coating. Ceramics such as a black enamel can be cited as the material of the optically-opaque coating.
  • the glass substrate 5 is applied to a vehicle and used as a window glass, when viewed from a vehicle exterior side of the window glass, the conductor provided on the optically-opaque coating is prevented by the optically-opaque coating from being seen from the vehicle exterior side of the window glass.
  • the window glass excels in design.
  • the glass antenna is not necessarily installed on the glass substrate.
  • the glass antenna can be installed on a substrate, such as a transparent plastic substrate, which is similar to the glass substrate.
  • the connector 1 including the holder portion illustrated in FIGS. 1A to 1F and the pickup portion illustrated in FIGS. 2A to 2F was manufactured.
  • the connecting pin 2a of the feeding terminal 2 was not cylindrically shaped.
  • the connecting pin 2a of the feeding terminal 2 was a square-pole-like pin like the attaching portion 2b of the feeding terminal 2.
  • the width a of the feeding terminal 2 of the connector 1 illustrated in FIGS. 1A to 1F was set at 2 mm.
  • the distance b between the feeding terminal 2 and each of the opposed portions of the earth terminal 3 was set at 2 mm.
  • FIGS. 2A to 2F a coaxial cable whose characteristic impedance was 50 ⁇ was connected to the pickup portion 21 of the manufactured connector 1.
  • the feeding terminal 2 and the earth terminal 3 of the connector 1 were respectively fixed by soldering to the feeding portion and the earth electrode 6 of the glass antenna installed on the glass substrate.
  • FIG. 5 shows a perspective view illustrating the antenna that has the connector 1 installed on the glass substrate.
  • the glass substrate 5 was 3.5 mm in thickness.
  • the earth electrode 6 was formed using a copper foil which was 300 mm long and 150 mm wide.
  • a CPW line structure and a quarter-wavelength monopole antenna element which resonants at about 1. 5GHz were formed at a central portion of a side of the earth electrode 6.
  • the values of the dimensions of the following parts described in FIG. 4 are as follows.
  • the manufactured connector 1 was installed at a position indicated by dashed lines on the glass substrate 5 and mounted by being soldered thereto.
  • the measurement of return loss which was one of antenna characteristics was performed.
  • the return loss at 1.55 GHz is -16dB (a voltage standing wave ratio is 1.38).
  • a voltage standing wave ratio is 1.38.
  • the characteristic impedance of the CPW line was 55 ⁇ .
  • the width s and the distance w to the earth electrode 6 were determined under the thickness of glass and those of the conductors such that the characteristic impedance is 50 ⁇ .
  • a target value of the characteristic impedance is set at 55 ⁇ substantially close to 50 ⁇ , in consideration of mountability and soldering workability.
  • the width s of the radiating element 7 and the distance w between the central conductor and each of the opposed portions of the earth electrode 6 can be determined and changed from the above values in view of the thickness of glass, the width of the radiating element 7, the mountability and the soldering workability so that the characteristic impedance is set at 75 ⁇ similarly.
  • the shape of the earth electrode 6 was set according to the present example.
  • the shape of the earth electrode 6 can optionally be changed in view of the characteristic according to the shape of the glass plate and the used frequency, and can be changed into a mesh-like shape.
  • the attaching portion 3b of the earth terminal 3 according to the present embodiment had a soldering area, similarly to the conventional connector. Thus, the attaching portion 3b had proof stress against an external force.
  • the wiring direction of the coaxial cable 23 was similar to that in the case of using the conventional connector. Accordingly, the connector according to the present examle can favorably be utilized as a connector for the glass antenna on the vehicular window glass.
  • FIG. 10 shows a perspective view illustrating a connector (a holder portion had a structure illustrated in FIGS. 8A to 8F , while a pickup portion had a structure illustrated in FIGS. 2A to 2F ).
  • the radiating element 8 was disposed so as to be separated at a distance g0 from the earth electrode 6 so that the feeding portion was disposed at the side of the earth electrode 6, and that the receiving portion was located away from the earth electrode 6, as illustrated in FIG. 9 .
  • a combination of the radiating element 8 and the earth electrode 6 was formed to be a monopole antenna. The values of the dimensions of the following parts described in FIG. 9 are as follows.
  • the holder portion 15 of the connector illustrated in FIG. 10 was mounted at a position indicated by dashed lines shown in FIG. 9 by being soldered thereto.
  • the mounting portion 12b of the feeding terminal 12 of the holder portion and the mounting portion 13b of the earth terminal 13 were connected to the feeding portion of the radiating element 8 and the earth electrode 6, respectively.
  • the pickup portion 21, to which the coaxial cable 23 was connected, was connected to the holder portion 15.
  • High-frequency signals received by the glass antenna were transmitted to the coaxial cable 23.
  • Measurement of return loss of this transmission line was performed, similarly to the example according to the invention. As is understood from results of the measurement shown in FIG. 7 , the level of the return loss was substantially flat on the whole in the GHz frequency range. Sufficient resonance was not observed. Thus, it is evaluated that the antenna performance cannot be exercised.
  • the connector according to the invention is utilized as a connector for a vehicular glass antenna which receives the digital terrestrial television broadcast (which uses frequencies ranging from 470 megahertz (MHz) to 862 MHz), and the UHF-band analog television broadcast, digital television broadcast, and digital radio broadcast (which use frequencies ranging from 170 MHz to 230 MHz) in Japan, South Korea, China, Brazil, the United States of America, Europe and the like.
  • digital terrestrial television broadcast which uses frequencies ranging from 470 megahertz (MHz) to 862 MHz
  • UHF-band analog television broadcast, digital television broadcast, and digital radio broadcast which use frequencies ranging from 170 MHz to 230 MHz
  • the connector according to the invention is utilized also as a connector for a vehicular glass antenna which receives the frequency-modulation (FM) band analog radio broadcast (which uses frequencies ranging from 76 MHz to 90 MHz) in Japan, the FM-band analog radio broadcast (which uses frequencies ranging from 88 MHz to 108 MHz) in the United States of America and the VHF-band analog television broadcast (which uses frequencies ranging from 90 MHz to 108 MHz and from 170 MHz to 222 MHz).
  • FM frequency-modulation
  • VHF-band analog television broadcast which uses frequencies ranging from 90 MHz to 108 MHz and from 170 MHz to 222 MHz.
  • the connector according to the invention is utilized also as a connector for a glass antenna which receives the broadcast and communication at frequencies in the 800 MHz band for mobile phones (which use frequencies ranging from 810 MHz to 960 MHz), the 1.5 GHz band for mobile phones (which use frequencies ranging from 1.429 GHz to 1.501 GHz), the 1.9 GHz band for mobile phones (which use frequencies ranging from 1.850 GHz to 1.990 GHz), the global positioning system (GPS) (which uses a frequency of 1,575.42 MHz), the vehicle information and communication system (VICS (trademark)) (which uses a frequency of 2.5 GHz), the electronic toll collection system (ETC (non-stop automatic fare collection system)) (which uses frequencies of the 5.8 GHz band), the dedicated short range communication (DSRC) (which uses frequencies of the 915 MHz band and the 5.8 GHz band), communication for the automotive keyless entry system (which uses frequencies ranging from 300 MHz to 450 MHz), and communication for the satellite digital audio radio service (SDARS) (which uses frequencies
  • the connector according to the invention can be utilized as a surface mounting type connector suitable for broadcast and communication using signals of high frequencies of a very high frequency (VHF) band (whose frequencies range from 30 MHz to 300 MHz), an ultrahigh frequency (UHF) band (whose frequencies range from 300 MHz to 3 GHz), a microwave (SHF) band (whose frequencies range from 3 GHz to 30 GHz).
  • VHF very high frequency
  • UHF ultrahigh frequency
  • SHF microwave
  • the antenna according to the invention is easily fixed to an insulating substrate, such as a glass substrate, and constructed to be strong.
  • the antenna according to the invention has resistance to vibrations, and durability.
  • the antenna according to the invention is suitable for a glass antenna mounted on a vehicular window glass.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)

Claims (5)

  1. Steckverbinder, umfassend:
    einen Halterabschnitt (10), welcher dafür geeignet ist, an einer Glasantenne auf einem Substrat angebracht zu werden, wobei der Halterabschnitt (10) enthält:
    einen Speiseanschluss (2);
    einen Erdungsanschluss (3); und
    einen Abnehmerabschnitt (21), welcher entfernbar an dem Halterabschnitt (10) angebracht ist, wobei der Abnehmerabschnitt (21) enthält:
    einen Kerndrahtleiter (25), welcher dafür geeignet ist, mit einem Kerndraht (23a) eines Koaxialkabels (23) verbunden zu werden, und welcher mit dem Speiseanschluss (2) verbunden ist, wenn er an dem Halterabschnitt (10) angebracht ist; und
    einen Erdungsleiter (24), welcher dafür geeignet ist, mit einem Außenleiter (23b) des Koaxialkabels (23) verbunden zu werden, und welcher mit dem Erdungsanschluss (3) verbunden ist, wenn er an dem Halterabschnitt (10) angebracht ist,
    dadurch gekennzeichnet, dass
    der Speiseanschluss (2) einen Verbindungsstift (2a), welcher zu einem Inneren eines Isoliergehäuses (4) des Halterabschnitts (10) hin montiert ist, und einen Verbindungsabschnitt (2b) umfasst, welcher mit der Glasantenne zu verbinden ist und eine vorgegebene Breite (a) hat,
    wobei der Speiseanschluss (2) und der Erdungsanschluss (3) des Steckverbinders eine koplanare Wellenleiterleitung konfigurieren, und
    der Erdungsanschluss (3) so angeordnet ist, dass er beide Seiten der Breite des Verbindungsabschnitts (2b) so einklemmt, dass ein vorgegebener Abstand (b) zwischen dem Erdungsanschluss (3) und jeder der beiden Seiten des Verbindungsabschnitts (2b) vorhanden ist;
    sodass eine charakteristische Impedanz des Steckverbinders, wenn der Abnehmerabschnitt (21) an dem Halterabschnitt (10) angebracht ist, gleich einer charakteristischen Impedanz des Koaxialkabels (23) ist.
  2. Steckverbinder nach Anspruch 1, ferner umfassend das Isoliergehäuse (4), welches in einer hohlen rechteckigen Parallelepiped-Form ausgebildet ist, deren beide Oberflächen offen sind, wobei:
    der Erdungsanschluss (3) Befestigungsabschnitte (3b) enthält, welche an beiden Enden in einer Richtung der längeren Seite einer Befestigungsfläche des Halterabschnitts (10) vorstehend vorgesehen sind, an welcher der Halterabschnitt (10) an der Glasantenne zu befestigen ist; und
    der Verbindungsabschnitt (2b) in einer Richtung der kürzeren Seite der Befestigungsfläche des Halterabschnitts (10) vorstehend vorgesehen ist, an welcher der Halterabschnitt (10) an der Glasantenne zu befestigen ist.
  3. Antenne, umfassend:
    einen Antennenabschnitt, welcher ein lineares Aussendeelement (7) und eine Erdungselektrode (6) enthält, wobei das Aussendeelement (7) und die Erdungselektrode (6) auf einem dielektrischen Substrat (5) angeordnet sind, wobei:
    der Speiseanschluss (2) des Steckverbinders nach einem der Ansprüche 1 bis 2 mit dem Aussendeelement (7) verbunden ist; und
    der Erdungsanschluss (3) des Steckverbinders mit der Erdungselektrode (6) verbunden ist.
  4. Antenne nach Anspruch 3, wobei
    ein Teil des Aussendeelements (7) und die Erdungselektrode (6) eine koplanare Wellenleiterleitung konfigurieren.
  5. Fahrzeugfensterglas, umfassend eine Antenne nach Anspruch 3 oder 4.
EP09015816.3A 2008-12-22 2009-12-21 Steckverbinder, Antenne mit dem Steckverbinder und Fahrzeugfensterglas mit der Antenne Not-in-force EP2200123B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008325821A JP5476713B2 (ja) 2008-12-22 2008-12-22 コネクタ及びこれを配置したアンテナ、並びにこのアンテナを備えた車両用窓ガラス

Publications (2)

Publication Number Publication Date
EP2200123A1 EP2200123A1 (de) 2010-06-23
EP2200123B1 true EP2200123B1 (de) 2016-11-30

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Country Status (3)

Country Link
EP (1) EP2200123B1 (de)
JP (1) JP5476713B2 (de)
CN (1) CN101902001B (de)

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JP2011228032A (ja) * 2010-04-16 2011-11-10 Fujikura Ltd ケーブルアセンブリ、及び、それを用いたアンテナシステム
JP2012142220A (ja) 2011-01-05 2012-07-26 Honda Tsushin Kogyo Co Ltd アンテナ用コネクタ
CN102991452B (zh) * 2011-09-16 2015-07-01 奥托立夫开发公司 安全带装置
JP6565521B2 (ja) * 2015-09-15 2019-08-28 Ａｇｃ株式会社 車両用アンテナ装置
EP3818589A1 (de) * 2018-07-02 2021-05-12 AGC Glass Europe Fahrzeugantennenverglasung
JP7178222B2 (ja) * 2018-09-19 2022-11-25 日本板硝子株式会社 車両用ガラスモジュール
JP7404142B2 (ja) * 2020-04-17 2023-12-25 日本航空電子工業株式会社 コネクタ、ハーネス及びコネクタ組立体
CN111987456B (zh) * 2020-07-24 2021-02-12 南京理工大学 一种用于微纳卫星的集成式低剖面uv天线

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JP2010146959A (ja) 2010-07-01
CN101902001A (zh) 2010-12-01
CN101902001B (zh) 2015-11-25
EP2200123A1 (de) 2010-06-23
JP5476713B2 (ja) 2014-04-23

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